Table 3-2. Preventive Maintenance Checks and Services
Interval
B--Before operation
A-After operation
M-Monthly
Operator
Org.
D-During operation
W-Weekly
Q-Quarterly
Daily
M
Q
Item to be inspected
Procedure
Reference
BDAW
X
Adjust, repair, or replace control lev-
ers, pedals, or linkage.
19
X
X
Hoist Cables
Inspect for excessive wear or fraying
of strands. Replace defective cables.
20
X
Main Hoist and Boom
Visually inspect for frayed cables, ex-
Hoist
cessive wear, or kinks. Replace de- (para's 3-30
fective cables. Inspect brake and
clutch bands on hoist drums. Adjust
as necessary. Report defective clutch
or brakes to organizational main-
tenance.
X
Replace defective clutch or brake lin-
ings.
and 3-135)
21
X
Jackshaft
Check swing clutches for excessive
wear and adjustment.
Adjust as necessary.
X
Replace defective clutch shoes as re- (para 3-128)
quired.
22
X
Engine Valve Mechanism
Every 1, 000 hours check valve adjust- (para 3-60)
ment. Correct setting for Model
687C-18-ES is:
0.012 inch (Hot)
0.014 inch (Cold)
Model D333TA is:
Intake 0.015 inch (Hot)
0.017 inch (Cold)
Exhaust 0.025 inch (Hot)
0.028 inch (Cold)
Section IV. OPERATOR'S MAINTENANCE
3-9. Engine Clutch Adjustment
3-7. General
a. General. The engine clutch, when engaged,
This section contains information necessary for
operator/crew maintenance of the crane-shovel, as
transfers power from engine to power take-off output
authorized by the maintenance allocation chart.
shaft which actuates the operating mechanisms. A drive
chain connects engine drive sprocket to main drive
3-8. Engine Inspection and Service
sprocket. Clutch control is through adjustable linkage
a. Inspection. Visually inspect engine compartment
from lever at operator's station to power takeoff. The
for cleanliness. Investigate all accumulations of oil, dirt,
clutch is in need of adjustment when it will not pull the
or dust, to assure that no lubricant or coolant leakage
load; it gets hot, or clutch control lever jumps out of the
exists.
Assure that all external lines, fittings, or
engaged position.
accessories are securely mounted and that no hardware
b. Adjusting the Engine Clutch.
or accessory is missing.
Report all defects to
(1) Refer to figure 3-8, remove two
organizational maintenance.
capscrews, lockwashers, and cover plate from housing.
b. Service.
(2) Disengage the clutch (para 2-8 aq) and
(1) Refer to current lubrication order LO 5-
turn pressure plate until lock (fig. 3-9) is up.
3810-201-12 for interval and type of lubricant to service
engine crankcase.
(2) Refer to paragraph 3-4 for service
instructions on oil filters, air cleaner, or oil strainer.
3-24
